Given the workaround shown in the referenced thread, it seems likely that it could be Flash rather than firefox that's at issue; although the curiosity of why it apparently works on Mint is odd:
see: http://helpx.adobe.com/x-productkb/multi/flash-player-11-problems-playing.html#id_48891 Step One: Install HAL
sudo apt-get install hal
Step Two: Quit your web browser
Step Three: Clean out the Adobe Flash folder:
cd ~/.adobe/Flash_Player rm -rf NativeCache AssetCache APSPrivateData2
Given the workaround shown in the referenced thread, it seems likely that it could be Flash rather than firefox that's at issue; although the curiosity of why it apparently works on Mint is odd:
see: helpx.adobe. com/x-productkb /multi/ flash-player- 11-problems- playing. html#id_ 48891
http://
Step One: Install HAL
sudo apt-get install hal
Step Two: Quit your web browser
Step Three: Clean out the Adobe Flash folder:
cd ~/.adobe/ Flash_Player
rm -rf NativeCache AssetCache APSPrivateData2